B

bar plots, 262–263
bar_plot procedure, 262–263
base widgets
child, 400
creating, 400–401, 402
event structures, 475–476
overview, 400–401
parent, 400
top-level, 400
widget_base function, 401, 402, 403, 418
widget_control keywords, 484
BBEdit text editor, 463
big-endian format, 162–164
binary files. See unformatted (binary) files
binread procedure, 166, 167
binwrite procedure, 166–167, 169
bit manipulation
bit masking for, 51–52
“shift and mask” method for, 52
bitmap output files, 343–355
formats supported by IDL, 343, 349
overview, 341–342
PNG as GIF replacement, 343
program for saving screen to, 352–355
reading from 8-bit display, 344–346
reading from 24-bit display, 346
reading from the display, 343–349
resolution, ...

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